AS26551 Sargent & Lundy Engineers 🇺🇸 US

Announcing 5 prefixes, seen at the RIS collectors.

IPv4 prefixes

71,168 (278 × /24)

IPv6 prefixes

Upstreams

transit providers observed

Peers

settlement-free adjacencies

Downstreams

transit customers observed

Customer cone

ASes reachable through it

Registry and operator data

AS number: AS26551
Name: Sargent & Lundy Engineers
Organisation: Sargent & Lundy Engineers
Country: 🇺🇸 US
RIR: ARIN
Allocated: 2002-10-15

RPKI coverage of this AS

Its own announcements, validated against the current ROA set

0 valid (0.0%) 0 invalid (0.0%) 5 no ROA (100.0%)

Whois

Fetched from whois.arin.net

ASNumber:       26551
ASName:         SARGENT-AND-LUNDY
ASHandle:       AS26551
RegDate:        2002-10-15
Updated:        2012-03-02
Ref:            https://rdap.arin.net/registry/autnum/26551

OrgName:        Sargent & Lundy Engineers
OrgId:          SLE-1
Address:        55 E. Monroe Street
City:           Chicago
StateProv:      IL
PostalCode:     60603
Country:        US
RegDate:        1991-07-30
Updated:        2025-12-28
Ref:            https://rdap.arin.net/registry/entity/SLE-1

OrgRoutingHandle: CHOUI16-ARIN
OrgRoutingName:   Chouikh, Mohammed
OrgRoutingPhone:  +1-312-269-6379
OrgRoutingEmail:  mohammed.chouikh@sargentlundy.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/CHOUI16-ARIN

OrgDNSHandle: CB2411-ARIN
OrgDNSName:   Berns, Christine
OrgDNSPhone:  +1-312-269-3598
OrgDNSEmail:  christine.m.berns@sargentlundy.com
OrgDNSRef:    https://rdap.arin.net/registry/entity/CB2411-ARIN

OrgTechHandle: CB2411-ARIN
OrgTechName:   Berns, Christine
OrgTechPhone:  +1-312-269-3598
OrgTechEmail:  christine.m.berns@sargentlundy.com
OrgTechRef:    https://rdap.arin.net/registry/entity/CB2411-ARIN

OrgTechHandle: CHOUI16-ARIN
OrgTechName:   Chouikh, Mohammed
OrgTechPhone:  +1-312-269-6379
OrgTechEmail:  mohammed.chouikh@sargentlundy.com
OrgTechRef:    https://rdap.arin.net/registry/entity/CHOUI16-ARIN

OrgAbuseHandle: CB2411-ARIN
OrgAbuseName:   Berns, Christine
OrgAbusePhone:  +1-312-269-3598
OrgAbuseEmail:  christine.m.berns@sargentlundy.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/CB2411-ARIN

OrgAbuseHandle: CHOUI16-ARIN
OrgAbuseName:   Chouikh, Mohammed
OrgAbusePhone:  +1-312-269-6379
OrgAbuseEmail:  mohammed.chouikh@sargentlundy.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/CHOUI16-ARIN

OrgDNSHandle: CHOUI16-ARIN
OrgDNSName:   Chouikh, Mohammed
OrgDNSPhone:  +1-312-269-6379
OrgDNSEmail:  mohammed.chouikh@sargentlundy.com
OrgDNSRef:    https://rdap.arin.net/registry/entity/CHOUI16-ARIN

OrgRoutingHandle: CB2411-ARIN
OrgRoutingName:   Berns, Christine
OrgRoutingPhone:  +1-312-269-3598
OrgRoutingEmail:  christine.m.berns@sargentlundy.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/CB2411-ARIN